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Re: [Xen-devel] Xen Security Advisory 7 (CVE-2012-0217) - PV privilege escalation

To: xen-devel@xxxxxxxxxxxxx
From: Andy Smith <andy@xxxxxxxxxxxxxx>
Date: Tue, 12 Jun 2012 12:15:10 +0000
Delivery-date: Tue, 12 Jun 2012 12:15:30 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>
Openpgp: id=BF15490B; url=http://strugglers.net/~andy/pubkey.asc

Hello,

A quick question with regard to XSA-7:

On Tue, Jun 12, 2012 at 01:02:32PM +0100, Xen.org security team wrote:
> MITIGATION
> ==========
> 
> This issue can be mitigated by running HVM (fully-virtualised)
> or 32 bit PV guests only.

Assuming 64-bit hypervisor and dom0, with PV guests booted using
pygrub, is there any way to restrict guests to 32-bit only?

Cheers,
Andy

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Follow-Ups:
- Re: [Xen-devel] Xen Security Advisory 7 (CVE-2012-0217) - PV privilege escalation
  - From: Ian Campbell

References:
- [Xen-devel] Xen Security Advisory 7 (CVE-2012-0217) - PV privilege escalation
  - From: Xen . org security team

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